This is a deluxe model of the classic Sucker Die Box, with all the usual sucker features, handsomely crafted in wood with inlay and trimmings for an antique finish, to give you a collector quality prop.
The Performer displays an empty double compartment box, with doors on front and top of box, and a solid Die. The Die is placed in one compartment, and the audience asked to remember where it is. The box is tilted, and the door to that compartment is opened, and the die is seen to have vanished.
The audience is not impressed, because they have heard the Die slide to the opposite compartment. They ask the magician to open the door to the other compartment. The magician closes the door to the first compartment. then tilts the box (the audience can again hear the die sliding over), then opens the door to the adjacent compartment to show that it is empty.
This business of sliding die from one compartment to the other is repeated, till the audience is howling for the doors to both compartments be opened simultaneously.
Finally, the Magician opens all four doors, in front and top, and proves the die has in fact vanished. The audience can see right through the box.  The solid die is found in a hat, or some other container.
A classic model of a classic effect, at a very reasonable price for the quality.